Near field light generating device and heat assisted magnetic recording head with the same

a technology of near field light generation and heat assisted magnetic recording, which is applied in the direction of near-field interaction recording, recording information storage, instruments, etc., can solve the problems of inability to record data, low light transmission efficiency, and small magnetic field signal from magnetic recording medium, so as to improve recording density and generate magnetic flux leakage

US7742368B2Inactive Publication Date: 2010-06-22SAMSUNG ELECTRONICS CO LTD
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Patent Information

Authority / Receiving Office
US · United States
Patent Type
Patents(United States)
Current Assignee / Owner
Publication Date
2010-06-22
Estimated Expiration
Not applicable · inactive patent

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Abstract

A near field light generating device generating near field light from incident light by using a solid immersion mirror and a heat assisted magnetic recording head with the same are provided. The near field light generating device includes a light source; a waveguide core which transmits light; and a solid immersion mirror, which generates near field light, including an upper transmission surface through which light from the waveguide core is transmitted into the solid immersion mirror, a lower reflection surface, opposite the upper transmission surface, which reflections light incident thereon, lateral reflection surfaces, facing each other at sides of the solid immersion mirror, which reflect light incident thereon, and a lower transmission region disposed at a center of the lower reflection surface. Light reflected from the lateral reflection surfaces forms a light spot on the lower transmission region.
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Description

CROSS-REFERENCE TO RELATED PATENT APPLICATION

[0001] This application claims the benefit of Korean Patent Application No. 10-2005-0096166, filed on Oct. 12, 2005, in the Korean Intellectual Property Office, the disclosure of which is incorporated herein in its entirety by reference.BACKGROUND OF THE INVENTION

[0002] 1. Field of the Invention

[0003] Apparatuses consistent with the present invention relate to a flat panel type near field light generating device which includes a flat panel type solid immersion mirror to generate near field light, and a heat assisted magnetic recording head with the same device.

[0004] 2. Description of the Related Art

[0005] Research has been conducted to increase the recording density of magnetic recording media. As recording density increases, the bit size for recording unit information on a magnetic recording medium is reduced. However, as the bit size is reduced, the magnetic field signal from the magnetic recording medium becomes small. Thus, it becomes nec...

Examples

Embodiment Construction

[0028]A near field light generating device and a heat assisted magnetic recording head with the same according to exemplary embodiments of the present invention will now be described more fully hereinafter with reference to the accompanying drawings.

[0029]FIG. 2A is a schematic perspective view of a near field light generating device 20 according to an exemplary embodiment of the present invention, and FIG. 2B is a sectional view taken along line II-II of FIG. 2A.

[0030]The near field light generating device 20 comprises a first clad layer 28, a waveguide core 21, a solid immersion mirror 22 formed on the first clad layer 28, and a light source 40. Further, a second clad layer 29 (see FIG. 7) may be layered on the waveguide core 21 and the solid immersion mirror 22.

[0031]The light source 40 is connected to one side of the waveguide core 21 and emits light to the waveguide core 21. The light source 40 may be, for example, a laser diode. In this case, the light source 40 may abut the w...